Feed mill



March 20, 1928.

J. A. DAY

FEED MILL 2 Sheets-Sheet 1 Filed Feb. 26. 1926 J. A. DAY

FEED MILL Filed Feb. 2e. 192e March 20, 1928.

Patented Mar. 20, 1928.

f sr Ares JAMES A. DAY, 0E KN'GXVILLE, TENNESSEE, ASSIGNOR TO TENNESSEE.

O. B. WISE, OF KNOXVILLE,

FEED MILL. i

Ajjrplcationv led February 26,1926. vSerial No. 90,948.

This inventionrelates to V feed :mills and `more particularly to thematerial contact and grindingl means therefor. ,f

Briefly stated7 an important object of this invent-ion is to provide a'feed mill in Which the material contact and 4grindingelements are int-he nature ot disks having theirperipheries provided Withteeth adaptedtor grinding engagement with the material, the disks being pivo'tallymounted so. that the saine are moved outwardlyv solely hycentritugal.torce and so that the same maymove inwardly in the event ot anexcessive feed.

A further object of the invention is to provide a feed mill in which thedisk-shaped material contact and lgrinding element are provided with aseries ot attaching means by which the positions ot the materia-lcontaotand grinding disks ma)T he changed for the presentation ot neWteeth tothe material. i i

A further object of theinvention is to provide a feed mill ofthecharacter specilied which is ot highly simplified constructiona durablein use and cheap to manufao.

ture. A Y

Other objects and advantages will he apparent during the course ot thefollowingr description.

In the accompanying drawings forming a partof this application and inwhich like numerals are employed to designate 'like parts throughout thesame,

Figure 1 is a yvertical sectional view through a feed millembodying theinvention;

Figure 2 is a vertical transverse sectional vievv taken on lino 22 otFigure l;

Figure 3 is a plan vienT of one of the material contacting and grindingelements.

ln the drawing wherein for the purpose ot illustration is shown apreferred embodiment ot the invention, the numeral 5 designates whatmight he said to he a stator through which a drive shaftti extends. Thedrive shaft may have connection with a suitable `source ot poiver andcarries a rotor consisting` ot a plurality oit spaced substantiallyparallel supportingt disks 7 having alined openings For the reception ofmain supporting` rods 8.

ln carrying out the invention the main supporting yrods 8 extend throughcertain ot the openings 9 of material Contact and grinding disks 10. f

ioned somewhat` after saw `teeth so that vthe` same Will haveleiiiective grinding engagementfivith the material introducedwinto thestator oruhopper. The disk shown in Fisgure 3 rotates in -a clockwisedirection soy that the sharp edges ot the teeth will he engaged with thematerial. When the outermost teeth of the various disks are Worn orpartlv worn the disks mav he chansredin their positionhv reason ofthemultiplicityv of openings 9 to present new teeth tor engagement with thematerial. This brings about the prolonged usefulness of the material`Contact,disksr Without the necessity oi"y resharpeninlfrltlie teeth ofthe same. l i f Particular attention is directed to the fact that-'theseveral disks l0 are indenendentlv movahle and arevurfred outwardlv intocontact with the material solelv hv centrifugal .force resulting fromtherotation lot thedisks 7 constituting the rotor. i l

Since the disks 10 are urged outwardlv to yoperative position inengagement with the material. solelv h v centrifugal torce no dan ageWill he done in the event of an overieed since the disks 10 will notmove out ouite so .far as thev otherwise would. When the rotorcomprising the disks 7 and associated elements is not in use the disksi() Willfhang looselv on thevrods 8 and will at all times he ready foroperation.

The parts of the mill. not specifically described mav he of conventionalconstruction or an improved construction, the main tea` ture of thisinvention being the construction of the material contactA andr grindingrelement. A

Attention is directed to Figure 2 which illustrates that completerotation ot the material Contact and ,grindingF disks is preventedhyrvvashers 15 mounted on the shaft 6 and adapted to maintain thesupporting members 'Z' in spaced relation to each other. Bv reason otthis construction all the centrifugal force generated bythe rotation ofthe rotor is transmitted to the disks whereby more effective grinding ofthe material is produced.

Having thus described the invention, what is claimed is:

1. In a grinding mill having a driven shaft, a plurality of supportingelements mounted on the shaft and having alined 'openings, and a rodextending through the openings, the combination of material contact andgrinding disks pivotally and eccentrically mounted upon said rod andhaving annular series of teeth for engaging the material, each toothhavingone end edge arranged substantially radially of the disk and theouter edge of each tooth extending diagonally inwardly, said materialcontact and grinding disks being urged outwardly by centrifugal force,and spacing members mounted upon said shaft and between said supportingelements for spacing the same and said spacing members being positionedto engage said disks for limiting the pivotal movement of said disks.

2. In a mill comprising a stator, a shaft extending through the stator.a rotor mounted on the shaft and comprising a plurality of supportingmembers having openings, a rod extending through the openings, thecombination of a plurality of disk-shaped material Contact and grindingelements having the outer edges thereof provided with teeth, saiddisk-shaped material contact and grinding elements being provided withspaced openings to selectively receive said rod whereby the disk-shapedmaterial contact and grinding elements may be adjusted for thepresentation of new teeth to the material, and spacing members mountedupon said shaft and between said supporting elements for spacing thesame and said spacing members being positioned to engage said disks forlimiting the pivotal movement of the same.

3. A material contact and grinding element for mills comprising arelatively thin disk-shaped body having the periphery thereof providedwith teeth, each tooth having one end edge arranged substantiallyradially of the disk and the outer end of each tooth extendingdiagonally inwardly whereby said diagonal tooth portion has both acutting and wedging effect on the material to be ground, saiddisk-shaped body being provided with spaced openings adapted forselectively receiving a supporting member whereby the disk-shaped bodymay be adjusted with respect to said supporting member for thepresentation of new teeth to the material.

4. In a mill comprising a stator, a shaft extending through the stator,a rotor mounted on the shaft and comprising a plurality of supportingmembers having openings, a. rod extending through the openings, thecombination of a plurality of disk-shaped material contact and grindingelements having the outer edges thereof provided with teeth. saiddisk-shaped material contact and grinding elements being provided withspaced openings to selectively receive said rod whereby the disk-shapedmaterial con tact and grinding elements may be adjusted for thepresentation of new teeth to the material, and means associated withsaid shaft for limiting the pivotal movement of said disks.

In testimony whereof I alix my signature.

JAMES A. DAY.

Uli

